I hired a contractor to install a new hot water heater. He did a wonderful job and I paid him. A week later I called him saying that I didn't see any inspection stickers or permit notices. It turns out he never pulled the permits for the work to be done. He said that he never pulls permits for water heaters and that when owners ask for it he tells them to find a different contractor. My problem is that I didn't find out beforehand. It turns out he is not a licensed plumber, only a licensed contractor. Is there anyway I can take action against him?